Pool



FIG. 1 is an isometric view of one embodiment of a pool showing my new design;

FIG. 2 is a side elevational view thereof, the front, back and opposite side elevational views being identical thereto;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is an isometric view of a second embodiment of a pool showing my new design. The front, back, and opposite side being identical thereto. The bottom is essentially the same as the bottom of the pool in FIG. 4. 

The ornamental design for a pool, as shown and described. 